The size of the asset has increased more than three time in the assets.car file after signing the ios app

The assets in the Asset.xcasset lesser than the asset in the Assets.car file. Because of this the iPA file size increased three times as Assets.car file inside the iPA increased. Why do the asset file size increased enormously. How do we prevent this ? I used Version 26.2 (17C52).

The size of the asset has increased more than three time in the assets.car file after signing the ios app
 
 
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